Folding square and scale-holder



(Model.)

W. H. GfOLDSBERRY. FOLDING SQUARE AND SCALE HOLDER.

Patented SeptQZB, 1883.

UNITED STATES WILLIAM H. eoLDsBERRY,

PATENT OFFICE.

OF CEDAR RAPIDS, IOVA.

FOLDING `SQUARE AND SCALE-HOLDER.

SPECIFICATION formingpart of Letters Patent No. 285,405, dated September1883.Y

Application filed April 12, 1883. (Model.)

To aZZ whom it may concern: l

Beitknownthat,VILLIAMHGoLDsBERRY, of Cedar Rapids, in the county of Linnand State of Iowa, have invented an Improved Folding Square, of whichthe following is a specification.

My invention consists in forming and com- Y bining a hinge-j oint, aprotractor, and an automatic locking device with the two arms of asquare, as hereinafter4 fully set forth, in such a manner that the twoarms can be readily folded into parallel position and automaticallylocked to promote convenience and safety in packing it away when not inuse, and readily unlocked and distended to various angles relative toeach other, and automatically locked in various positions when used as aprotractor and square for drafting garments or for any other purpose forwhich protractors and squares are adapted to be used.

Figure l of my drawings is a top view of my joint and locking device.Fig. 2 shows my square open as required for use as a square. Fig. 3shows it folded ready to pack away. Together these gures clearlyillustrate the construction and operation of my complete invention.

A and B represent the arms of the square. They are preferably made ofwood when designed for tailors7 use.

C is the socket portion of my hinged joint, preferably made of castmetal. It has a square corner, d, at its outside edge, a cavity, c,adapted to receive the knuckle portion of the joint, and an extension,f, at its inner edge to support the bolt of my locking device.

g is a bolt that extends through perforations ject up through a cavityin a covering-plate.

l 2 3 4 represent a serrated edge, or notches formed in the curvedportion of the knuckle, that comes in contact with the bolt gwhen thearm B is moved to or from the arm A.

k is a flat metal plate fitted on top of the end of the arm B to overlapthe angular end of the metal casting C2. A corresponding plate is fittedon the under side, and both the plates are riveted fast upon the end ofthe arm B and the angular end of the part C2. A

m is a flat metal plate fitted to the end of the arm A and the metalcasting C. A corresponding plate is fitted to the under sides of thesame parts, and both the plates are riveted fast to the armAaud thesocket portion of the joint.

n is an extension and protractor formed integral with the plate m insuch a manner that its curved edge will be concentric with the pivot,and center r of the complete joint that extends through a perforationin the knuckle part C2 and coinciding perforations in the plates WL it.

s is a slot in the plate m, through which the catch h extends from thebolt g. By marking a scale of degrees on the protractor-surface n theshort arm B can be readily set at any degree of angle desired relativeto the long arm A.

t t are spring-catches fixed on the top surf face ofthe square to claspdetachable measures orlscales such as are used by tailorsin draftinggarments.

To open my square when folded and locked, I simply, by means of theprojecting catch h of the bolt g, press the bolt away from the serratedor notched segment of the knuckle portion C2, and then distend the hingeand move the arm B to any angle desired relative to the arm A, and allowthe spring i to force the bolt into one of the notches in the segment orcurved IOO 2 l I @MAM ing bolt7 and the metal casting C2, having aknuckle adapted to iit in the corresponding cavity of the said part C,and also a serrated or notched segment, 1 2 3 4, substantially as shownand described7 for the purposes specified.

2. rlhe joint-section C, having an extension and bolt bearing7 f, thesliding bolt g, having a proj ection7 71v7 andthe hinged section C2,having a serrated or notched segment7 l 2 3 4, arranged and combinedwith the arms of aV 'folding square7 substantially as and for thepurposes set forth.

3. The improved folding square and protraetor composed of the arms A andB, the metal jointsections C and G2, the locking device j" g 7L i, theoverlapping plates is, and the plates m, having an extension7 n, andaprotractor-scale7 and a slot, s, in one of the said plates m n,substantially as shown and described7 to operate in the manner setforth7 'for the purposes specified. f

VILLIAM H. GOLDSBER-RY. lvitnesses:

l. N. VHITTAM, N. E.' BLANCIYIAM).

